<script setup>
import categoryApi from "@/api/category.js";
import { useRoute } from "vue-router";
import { ref, onMounted } from "vue";
import GoodsItem from "../Home/components/GoodsItem.vue";

//获取面包屑导航数据
const categoryData = ref({});
const route = useRoute();
const getCategoryData = async () => {
  const res = await categoryApi.getSubCategoryData(route.params.id);
  //console.log(res);
  categoryData.value = res.result;
};
onMounted(() => getCategoryData());


//获取基础列表数据渲染
const goodList = ref([]);
const reqData = ref({
  categoryId: route.params.id,//获取子分类id
  page: 1,//当前页
  pageSize: 8,//每页的条数
  sortField: "publishTime",//排序字段
});
const getGoodsList = async () => {
    const res = await categoryApi.getSubCategoryListData(reqData.value);
    goodList.value = res.result.items;
}
onMounted(() => getGoodsList());

//tab切换时候触发，使用的是element plus的tab-change事件
const onTabChange = () => {
  //console.log("tab切换了",reqData.value.sortField);
  reqData.value.page = 1;//重置页码
  getGoodsList();//重新发送axios请求
}

//无限滚动，加载跟多
const disabled = ref(false);
const load = async () => {
  //console.log("加载更多");
  reqData.value.page++;
  const res = await categoryApi.getSubCategoryListData(reqData.value);
  goodList.value = [...goodList.value,...res.result.items];
  //加载完毕
  if(res.result.items.length === 0){
    //console.log("加载完毕");
    return disabled.value = true;
  }
}
</script>

<template>
  <div class="container">
    <!-- 面包屑 -->
    <div class="bread-container">
      <el-breadcrumb separator=">">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item :to="{ path: `/category/${categoryData.parentId}` }">
            {{ categoryData.parentName }}
        </el-breadcrumb-item>
        <el-breadcrumb-item>{{ categoryData.name }}</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="sub-container">
      <el-tabs v-model="reqData.sortField" @tab-change="onTabChange">
        <el-tab-pane label="最新商品" name="publishTime"></el-tab-pane>
        <el-tab-pane label="最高人气" name="orderNum"></el-tab-pane>
        <el-tab-pane label="评论最多" name="evaluateNum"></el-tab-pane>
      </el-tabs>
      <div
        class="body"
        v-infinite-scroll="load"
        :infinite-scroll-disabled="disabled"
      >
        <!-- 商品列表-->
         <GoodsItem v-for="goods in goodList" :goods="goods" :key="goods.id" />
      </div> 
    </div>
  </div>
</template>



<style lang="scss" scoped>
.bread-container {
  padding: 25px 0;
  color: #666;
}

.sub-container {
  padding: 20px 10px;
  background-color: #fff;

  .body {
    display: flex;
    flex-wrap: wrap;
    padding: 0 10px;
  }

  .goods-item {
    display: block;
    width: 220px;
    margin-right: 20px;
    padding: 20px 30px;
    text-align: center;

    img {
      width: 160px;
      height: 160px;
    }

    p {
      padding-top: 10px;
    }

    .name {
      font-size: 16px;
    }

    .desc {
      color: #999;
      height: 29px;
    }

    .price {
      color: $priceColor;
      font-size: 20px;
    }
  }

  .pagination-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
  }
}
</style>